XITRON 2000I, User Manual

Page: 66 / 96

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2000I & 2000M User Guide, Rev B
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To enter a password at this time, press the digits for the new
password (up to 10 digits). Press the CLR key to abort, as required.
Press any of the Units/Enter keys to place the password in
non-volatile storage. Use this entered password for all subsequent
external calibrations. If the user presses a Units/Enter key (V, A, ºC
or ºF), having pressed no numeric keys, then a null password is
entered, which effectively disables the password protection system.
•
If the previously selected password has been lost, use the common
password for all 2000 instruments, which is listed on the last page of
this user guide. Note that this page/password may have been filed to
prevent access. The following will display:
<Select password>
8. The instrument is ready to begin the external calibration sequence.
Performing External Calibration
The instrument automatically selects the next output level and selects the
“Adjust” mode of operation, with the least significant digit as the adjustment
digit.
Front Panel Key Adjustments
The
3
left and
4
right arrow keys select the adjustment digit, the
5
up and
6
down arrow keys adjust the selected digit. To abort any external
calibration step press the CLR key. To abort the calibration entirely press the
MNU key. To normally end a calibration step—thus entering the adjusted
calibration factor, press any of the Units/Enter keys.
Note: Pressing a Units/Enter key while the displayed deviation is at zero
will effectively skip the procedure to the next calibration
point without
affecting the calibration factor.
Important Note:
Take precautions against thermally generated voltages
during the execution of the external calibration as extemely low-level DC
voltage measurements are required. Be advised of the
Applications chapter
discussion regarding low-level DC voltage connections.